21530034512 has 20 divisors (see below), whose sum is σ = 47673648096. Its totient is φ = 9227157600.

The previous prime is 21530034503. The next prime is 21530034521. The reversal of 21530034512 is 21543003512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21530034503) and next prime (21530034521).

It is a super-2 number, since 2×21530034512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96116114 + ... + 96116337.

Almost surely, 2^21530034512 is an apocalyptic number.

It is an amenable number.

21530034512 is an abundant number, since it is smaller than the sum of its proper divisors (26143613584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21530034512 is a wasteful number, since it uses less digits than its factorization.

21530034512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192232466 (or 192232460 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 21530034512 in words is "twenty-one billion, five hundred thirty million, thirty-four thousand, five hundred twelve".